THE CLEANING APPARATUS. 



so that the chain carries the tailings up the lower pipe. The 

 speed of the drive shaft at top is 185 revolutions per minute 

 and the upper and lower sprockets having the same number 

 of teeth, the tailings auger also runs at this speed. 



Oiling Tailings Elevator. The boxes to be oiled on tail- 

 ings elevator are the two of the shaft at the upper end, the 

 one bolted to "boot" at lower end and its mate, which is at 

 the other end of the auger on opposite side of separator. The 

 tailings conveyor has two bearings for the small cross-shaft 

 and one at each end of auger. These should be frequently 

 oiled and the bevel gears kept greased. 



'Adjusting Chains of Tailings Elevator. The boxes at the 

 upper end of the elevator have slotted holes to allow them 

 to be moved for tightening the chain carrying the cups. Set- 

 screws with long threads aid in adjusting the boxes and in 

 holding them in place. This chain should be kept tight 

 enough to prevent it from unhooking, but it should have 

 slack enough to run freely. The short chain driving the tail- 

 ings conveyor is tightened by lowering the brackets support- 

 ing it, the holes in which are slotted for this purpose. 



To Put Chain in Tailings Elevator. Tie a weight to the 

 end of rope and drop it down the lower part of elevator. 

 Untie the weight and tie rope to end of chain, and while one 

 man is pulling on the rope from above let another feed the 

 chain in from below. When chain appears at the top, drop 

 the rope down the upper part of the elevator, and when chain 



